There is an ongoing talk among everyone on which Hunter member will fight which Genei Riodan.
My personal favourite would be
1. Killhua vs Feitan, Franklin and Bonorenofu
2. Kurapica vs Sphinx, Kuroro and Kurotopi
3. Gon vs Nobunaga, Sharnock and Shizuku
I didn't add Machi beacuse i wanted her to fight Hisoka, because there seems to be something between those two.. I know Hisoka isn't a Hunter gang, but he isn't a Genei Ryodan as well.
In the current events, he seems to be helping the Hunter gang, even if it is for his own reason, so….
4. Hisoka vs Machi
I also did not add Leorio because i'am not sure whether he has nen to fight any of them.